Information

68 | Signal Chain Guide 2013 Texas Instruments
Monitoring and Control
Motor Drivers
Get more information: www.ti.com/product/DRV8837
Industry’s Smallest 1.8 A Brushed DC Motor Driver
DRV8837
DRV8837 functional block diagram
The DRV8837 is an integrated motor driver IC for brushed DC motor drive applica-
tions. The output driver block consists of N-channel power MOSFETs configured as an
H-bridge to drive the motor winding. An inter
nal charge pump generates needed gate-
drive voltages. The DRV8837 can supply up to 1.8 A of output current. It operates on a
motor power-supply voltage of 1.8 V to 11 V, a device power-supply voltage of 1.8 V to
7 V and supports up to 6 stack alkaline or 2-stack Li-ion battery pack applications. Low
R
DSON
and ultra low sleep current help extend battery life. The DRV8837 has a PWM
(IN/IN) input interface, which is compatible with industry-standard devices. Internal
shutdown functions/protection is provided for over-current, short-circuit, under-voltage
lockout and ove-temperature events.
Key Features
• SingleH-Bridgemotordriverwith
1.8 to 11 V supply voltage
•
SplitV
m
/V
cc
supplies improve
performance and prevent battery
voltage drop from tripping UVLO
•
Upto1.8Acontinuous/1.8Apeak
output current
•
280mΩR
DS(ON)
(HS + LS) and
ultra-low 35 nA sleep current extend
battery life
•
Robustshortcircuit,thermal,shoot-
through, and UVLO protection
• Tiny8-pinWSON(2.0x2.0mm)
package
• Easy-to-useevaluationmoduleand
design-in documentation
Applications
• Toys
• E-locks
• Smartmeters(gasandwater)
• Batterypoweredconsumerproducts
Short
Circuit
OUT1
OUT2
GND
V
M
(motor)
Gate
Drive
Logic
Shoot
Through
Thermal
M
Charge
Pump
PWM 1
1.8 to 11 V
SLEEP
H-Bridge
PWM 2
V
CC
(Logic)
1.8 to 7 V
Under
Voltage
MSP430
TM
Controller